[libcamera-devel] [PATCH v2] libcamera: ipa_manager: Fix handling of unset LIBCAMERA_IPA_MODULE_PATH
Niklas Söderlund
niklas.soderlund at ragnatech.se
Mon Jun 10 23:00:23 CEST 2019
If the environment variable LIBCAMERA_IPA_MODULE_PATH is not set
utils::secure_getenv() will return a nullptr. Assigning a nullptr to a
std::string is not valid and results in a crash,
terminate called after throwing an instance of 'std::logic_error'
what(): basic_string::_M_construct null not valid
Fix this by operating directly on the returned char array instead of
turning it into a std::string.
Signed-off-by: Niklas Söderlund <niklas.soderlund at ragnatech.se>
---
src/libcamera/ipa_manager.cpp | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
diff --git a/src/libcamera/ipa_manager.cpp b/src/libcamera/ipa_manager.cpp
index f689aa69b7284092..b9b772d1d5e7795f 100644
--- a/src/libcamera/ipa_manager.cpp
+++ b/src/libcamera/ipa_manager.cpp
@@ -34,19 +34,22 @@ IPAManager::IPAManager()
{
addDir(IPA_MODULE_DIR);
- std::string modulePaths = utils::secure_getenv("LIBCAMERA_IPA_MODULE_PATH");
- if (modulePaths.empty())
+ const char *modulePaths = utils::secure_getenv("LIBCAMERA_IPA_MODULE_PATH");
+ if (!modulePaths)
return;
- for (size_t pos = 0, delim = 0; delim != std::string::npos;
- pos = delim + 1) {
- delim = modulePaths.find(':', pos);
- size_t count = delim == std::string::npos ? delim : delim - pos;
- std::string path = modulePaths.substr(pos, count);
- if (path.empty())
- continue;
+ while (1) {
+ const char *delim = strchrnul(modulePaths, ':');
+ size_t count = delim - modulePaths;
- addDir(path.c_str());
+ std::string path(modulePaths, count);
+ if (!path.empty())
+ addDir(path.c_str());
+
+ if (*delim == '\0')
+ break;
+
+ modulePaths += count + 1;
}
}
--
2.21.0
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